ENGINEERING GEOLOGICAL CHARACTERISTICS OF LOOSE BEDAND PREDICTION OF LAND SUBSIDENCE IN XINJI MINING AREA

In order to effectively control the land subsidence in Xinji Mining Area,the relationship between the engineering geological characteristics and land subsidence of Quaternary loose bed in this region is analyzed.Most of mechanical parameters of loose bed is less varied within 30m below the surface,but is obviously varied below the buried depth of 30m.The compressibility of clayey soil is larger obviously than that of sandy soil because the clay contains high content of illite,with better drainage condition and larger compressbility.The loose bed is divided into three main compressible layers,and the calculating model of land subsidence is estabished.It is predicted that the land subsidence ranges in 0.2832~0.8293m in this region.